Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, forquality control
byquality control » quality control, _quality control, forquality control
20 reliability » 10 reliability, 24 reliability, 29 reliability
ic reliability » 5 reliability, 9 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
22 safety » 12 safety, 5 safety, 4 safety
2 safety » 5 safety, 4 safety, 3 safety
a safety » a safe

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %((22quality control) OR (byquality control))%((((20 reliability) OR (2 reliability))) OR (ic reliability))%((((22 safety) OR (2 safety))) OR (((2((a safety) OR (_ safety))) OR (((a safety) OR (_ safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (byquality control))%((((20 reliability) or (2 reliability))) or (ic reliability))%((((22 safety) or (2 safety))) or (((2((a safety) OR (_ safety))) or (((a safety) OR (_ safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (byquality control))%((((20 reliability) or (2 reliability))) or (ic reliability))%((((22 safety) or (2 safety))) or (((2((a safety) OR (_ safety))) or (((a safety) OR (_ safety)))))) and risk%22*.